System suitability testing was performed on TLC plates using a standard AMD solution of 25 μg/spot. The precision of the proposed method was determined by replicate analysis of nine separate samples of the same solution; results are shown in Figure 3. The relative standard deviation (RSD) of the calculated Rf values was close to zero, and the RSD of the raw volumes (pixel intensities) were 4.73%. This good level of precision was suitable for quality control
analysis of AMD. Accuracy was checked by analysis of AMD sample solutions at three concentration levels (10,15, and 30 μg/spot), by calibration curve generated on the same TLC plate. The error did not exceed 0.41% (Table 1).